Mars Rover leads Jun 26 LEGO radar
42158 NASA Mars Perseverance Rover leads today’s LEGO deal radar on a $67.82 BrickRanker value, 32.2% discount to MSRP, +40.21% 2-year forecast midpoint, and the tightest forecast band in the tracked pool. Mona Lisa, Fountain Garden, Acclamator, and Ahsoka’s Jedi Interceptor follow with price ceilings and action caveats.
42158 NASA Mars Perseverance Rover is today's screen-first set. BrickRanker shows it at $67.82, 32.2% below its $99.99 MSRP, with a +40.21% 2-year forecast midpoint and the narrowest forecast band in the tracked pool at 5.44 percentage points. The caveat is data age: the page was last updated in May 2026, so treat $67.82 as a buy-ceiling reference, not a live listing price. 1
No marketplace listing URLs, seller ratings, listing conditions, or listing timestamps were available in today's source set. That makes this issue a price-reference radar: use the ranked sets below to decide what to search for, then verify the active listing, box condition, parts completeness, and seller history before buying.
Quick screen
#1 — 42158 NASA Mars Perseverance Rover
- Why it leads: Best eligible forecast profile: +40.21% midpoint, 37.54% to 42.98% range, and the tightest band at 5.44 percentage points. 1
- Price anchor: $67.82 BrickRanker value vs. $99.99 MSRP, a 32.2% discount. 1
- Liquidity and timing: 72 sales in the last 6 months; estimated retirement Jul 31, 2026; data last updated May 2026. 1
- Action: Screen active listings at or below the high-$60s first. Pay more only if the copy is sealed, photos are complete, and the seller has strong LEGO transaction history.
#2 — 31213 Mona Lisa
- Why it ranks: Deepest eligible discount today, but weaker liquidity than Mars Rover. 2
- Price anchor: $61.07 BrickRanker value vs. $99.99 MSRP, a 38.9% discount. 2
- Forecast: +28.71% midpoint, with a 21.93% to 35.49% range. 2
- Liquidity and timing: 44 sales in the last 6 months; estimated retirement Jul 31, 2026; data last updated May 2026. 2
- Action: Search only if the listing is clearly sealed or has complete tile inventory. The discount is strong, but the 44-sale base makes stale-price risk higher than Mars Rover.
#3 — 10359 Fountain Garden
- Why it ranks: Strong discount and positive forecast, held back by the oldest eligible data. 3
- Price anchor: $67.43 BrickRanker value vs. $99.99 MSRP, a 32.6% discount. 3
- Forecast: +29.04% midpoint, with a wide 9.61% to 41.67% range. 3
- Liquidity and timing: 26 sales in the last 6 months; estimated retirement Jul 31, 2026; data last updated Apr 2026. 3
- Action: Do not chase this above the high-$60s without a fresh marketplace comp. The 60-day-old data and 26-sale base make the current value more fragile than the headline discount suggests.
#4 — 75404 Acclamator-class Assault Ship
- Why it ranks: Fresh data, solid sales count, and a low absolute buy-in. 4
- Price anchor: $36.07 BrickRanker value vs. $49.99 MSRP, a 27.9% discount. 4
- Forecast: +21.20% midpoint, with a 10.81% to 29.97% range. 4
- Liquidity and timing: 101 sales in the last 6 months; estimated retirement Jul 31, 2026; data updated in Jun 2026. 4
- Action: This is the cleaner low-ticket screen than Fountain Garden because the data is fresh. The trade-off is lower upside and no minifigure value cushion.
#5 — 75401 Ahsoka's Jedi Interceptor
- Why it ranks: Best liquidity in the eligible pool, but the forecast is the weakest among today's top five. 5
- Price anchor: $33.84 BrickRanker value vs. $44.99 MSRP, a 24.8% discount. 5
- Forecast: +14.13% midpoint, with a 2.39% to 22.74% range. 5
- Liquidity and timing: 164 sales in the last 6 months; estimated retirement Jul 31, 2026; data updated in Jun 2026. 5
- Minifigure check: BrickRanker lists 3 minifigures, including Anakin Skywalker at $9.89, Ahsoka Tano at $9.56, and Astromech Droid R7-A7 at $5.50. 5
- Action: Best for buyers who want liquidity and a low purchase price rather than maximum appreciation. Verify the two named character minifigures closely; missing or swapped figures change the value case.
Why Mars Rover gets the lead
Mars Rover does not have the deepest discount. Mona Lisa is cheaper against MSRP at −38.9%, and Fountain Garden is slightly deeper at −32.6%. The reason Mars Rover leads is the combination of discount, forecast strength, and forecast confidence. BrickRanker's range for Mars Rover runs from +37.54% to +42.98%, a 5.44pp band, while Mona Lisa spans 13.56pp and Fountain Garden spans 32.06pp. 123
The set also has a cleaner collector story than several alternatives. LEGO Technic 42158 is a NASA-branded display-and-function model with 1,132 pieces and no minifigure value to separate from the build. That means the buy decision is simpler: the box, bags, stickers, and rover build need to be complete. There is no minifigure arbitrage to rescue a weak copy. 1
The timing caveat matters. BrickRanker lists the Mars Rover as retiring Jul 31, 2026, but its value page is about 30 days stale. A buyer should use $67.82 as a ceiling for first-pass screening, not as proof that a live marketplace listing at that price exists today. 1
Authentication and listing checks
For 42158 Mars Rover, ask for photos of the sealed box edges or, for an open copy, all numbered bags, sticker sheet, wheels, suspension arms, and the small Ingenuity helicopter build. The Technic pieces are not hard to substitute, so incomplete open-box copies need a parts inventory before payment.
For 31213 Mona Lisa, the risk is tile completeness and frame condition. A listing that shows only the finished mosaic from the front is not enough. Ask for close-ups of the gold frame elements and the remaining spare pieces if the set is open.
For 75401 Ahsoka's Jedi Interceptor, the minifigures carry much of the practical value. Confirm the Ahsoka Tano and Anakin Skywalker figures are present, undamaged, and not replaced with cheaper variants before using the $33.84 BrickRanker value as a benchmark. 5
Sideboard
76328 Batman: The Classic TV Series Batmobile is newly lead-eligible after cooldown, but its discount is too shallow for today's top tier. BrickRanker shows $137.23 vs. $149.99 MSRP, only 8.5% below retail, with a +18.53% forecast midpoint and 47 sales in the last 6 months. That is a watchlist set, not a first-click deal, unless a live listing drops meaningfully below the $137 level. 6
10338 Bumblebee remains eligible and usable as a secondary search target, with $65.70 against an $89.99 MSRP, a 27.0% discount, and a +23.57% forecast midpoint. Its forecast band is wide at 25.39pp, and the data was last updated in May 2026, so it does not outrank fresher Star Wars entries today. 7
42151 Bugatti Bolide has a deep 36.8% discount at $31.61 vs. $49.99 MSRP, but BrickRanker still lacks a 2-year forecast and piece count for the set. That missing forecast keeps it out of the ranked top five despite the low entry price. 8
Market backdrop
BrickRanker's retirement tracker shows 110 sets marked "Retiring soon!" across about 679 tracked sets and 40 themes. The retiring-soon count is unchanged from the prior checkpoint, while the theme count rose by one. All 19 monitored core sets remain active with Jul 31, 2026 retirement dates in today's source set. 9
The action rule is simple: search Mars Rover first, Mona Lisa second, then Acclamator if you want fresher data and lower absolute spend. For every candidate, the BrickRanker value is a benchmark, not a substitute for checking the actual listing photos, seller record, and completeness.
Cover image: image from BrickRanker: LEGO NASA Mars Perseverance Rover (42158-1).
References
- 1BrickRanker: LEGO NASA Mars Perseverance Rover (42158-1)
brickranker.com
- 2BrickRanker: LEGO Mona Lisa (31213-1)
brickranker.com
- 3BrickRanker: LEGO Fountain Garden (10359-1)
brickranker.com
- 4BrickRanker: LEGO Acclamator-class Assault Ship (75404-1)
brickranker.com
- 5BrickRanker: LEGO Ahsoka's Jedi Interceptor (75401-1)
brickranker.com
- 6
- 7BrickRanker: LEGO Bumblebee (10338-1)
brickranker.com
- 8BrickRanker: LEGO Bugatti Bolide (42151-1)
brickranker.com
- 9BrickRanker: Retirement Tracker
brickranker.com
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